GB2031248B - Method and apparatus for measuring telephone line characteristics - Google Patents

Method and apparatus for measuring telephone line characteristics

Info

Publication number: GB2031248B
Authority: GB; United Kingdom
Prior art keywords: telephone line; line characteristics; measuring; measuring telephone; telephone
Prior art date: 1978-09-21
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

GB7930339A

Other versions

GB2031248A (en

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Nortel Networks Ltd

Original Assignee

Northern Telecom Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1978-09-21

Filing date

1979-08-31

Publication date

1982-12-22

1979-08-31 Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd

1980-04-16 Publication of GB2031248A publication Critical patent/GB2031248A/en

1982-12-22 Application granted granted Critical

1982-12-22 Publication of GB2031248B publication Critical patent/GB2031248B/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Measurement Of Resistance Or Impedance (AREA)
Monitoring And Testing Of Exchanges (AREA)
Monitoring And Testing Of Transmission In General (AREA)
Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

GB7930339A 1978-09-21 1979-08-31 Method and apparatus for measuring telephone line characteristics Expired GB2031248B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA311,757A CA1092653A (en)	1978-09-21	1978-09-21	Method and apparatus for measuring telephone line

Publications (2)

Publication Number	Publication Date
GB2031248A GB2031248A (en)	1980-04-16
GB2031248B true GB2031248B (en)	1982-12-22

Family

ID=4112404

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB7930339A Expired GB2031248B (en)	1978-09-21	1979-08-31	Method and apparatus for measuring telephone line characteristics

Country Status (8)

Country	Link
JP (1)	JPS5542495A (en)
AT (1)	AT384698B (en)
CA (1)	CA1092653A (en)
DE (1)	DE2936722A1 (en)
FR (1)	FR2436999A1 (en)
GB (1)	GB2031248B (en)
NL (1)	NL7906671A (en)
SE (1)	SE435775B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH0744604B2 (en) *	1985-05-17	1995-05-15	日本電気株式会社	Subscriber line monitoring circuit
GB2269073B (en) *	1992-07-23	1996-06-19	Northern Telecom Ltd	Remote line tester
GB9613287D0 (en) *	1996-06-25	1996-08-28	Raychem Ltd	Ground testing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4028507A (en) *	1976-06-28	1977-06-07	Bell Telephone Laboratories, Incorporated	Apparatus for applying particular voltages to three-terminal circuits and measuring resulting current flows for the purpose of determining circuit characteristics

1978
- 1978-09-21 CA CA311,757A patent/CA1092653A/en not_active Expired
1979
- 1979-08-31 GB GB7930339A patent/GB2031248B/en not_active Expired
- 1979-09-06 NL NL7906671A patent/NL7906671A/en not_active Application Discontinuation
- 1979-09-11 DE DE19792936722 patent/DE2936722A1/en not_active Withdrawn
- 1979-09-14 AT AT0606579A patent/AT384698B/en not_active IP Right Cessation
- 1979-09-19 JP JP11945979A patent/JPS5542495A/en active Granted
- 1979-09-19 SE SE7907752A patent/SE435775B/en not_active IP Right Cessation
- 1979-09-20 FR FR7923477A patent/FR2436999A1/en active Granted

Also Published As

Publication number	Publication date
SE435775B (en)	1984-10-15
GB2031248A (en)	1980-04-16
ATA606579A (en)	1987-05-15
FR2436999B1 (en)	1983-07-01
JPS5542495A (en)	1980-03-25
AT384698B (en)	1987-12-28
CA1092653A (en)	1980-12-30
FR2436999A1 (en)	1980-04-18
NL7906671A (en)	1980-03-25
JPS6322111B2 (en)	1988-05-10
DE2936722A1 (en)	1980-04-10
SE7907752L (en)	1980-03-22

Similar Documents

Publication	Publication Date	Title
DE2963340D1 (en)	1982-09-02	Method and means for measuring relative positions
JPS57124269A (en)	1982-08-03	Range measuring method and apparatus
JPS52148610A (en)	1977-12-10	Method and apparatus for filterrsterilized blooddagglutination composition
GB2016710B (en)	1983-02-23	Device and method for measuring surface properties
GB2038002B (en)	1983-04-13	Method and apparatus for measuring porosity
JPS54114265A (en)	1979-09-06	Cover inspecting apparatus and method
GB2022168B (en)	1982-09-22	Pipeburying underwater-trenching apparatus and method
GB2021775B (en)	1983-02-09	Finish measuring method and apparatus
IL57498A0 (en)	1979-10-31	Method and apparatus for jumigating
GB2023827B (en)	1982-09-15	Method and apparatus for measuring sound
GB2073882B (en)	1984-08-30	Method and apparatus for measuring colloidal stability
GB2017317B (en)	1982-11-10	Method and apparatus for measuring surface tension
JPS54115329A (en)	1979-09-07	Method and apparatus for diazotating amine
GB2031248B (en)	1982-12-22	Method and apparatus for measuring telephone line characteristics
GB2030511B (en)	1982-08-18	Pupe making apparatus and method
GB2026176B (en)	1983-01-06	Weighing method and apparatus
JPS54110867A (en)	1979-08-30	Thickness measuring method and apparatus
JPS5589751A (en)	1980-07-07	Method and apparatus for measuring malondialdehyde
JPS54110937A (en)	1979-08-30	Method and apparatus for fast plating
JPS54157740A (en)	1979-12-12	Method and apparatus for plating
GB2036337B (en)	1983-06-22	Method and apparatus for measuring strength characteristics
JPS5371895A (en)	1978-06-26	Measuring method and apparatus for fluidity
JPS52134484A (en)	1977-11-10	Colorimetric method and apparatus for same
ZA781209B (en)	1979-10-31	An improved measuring method and apparatus
HU179805B (en)	1982-12-28	Apparatus and method for measuring length

Legal Events

Date	Code	Title	Description
1999-09-22	PE20	Patent expired after termination of 20 years	Effective date: 19990830